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Leetcode 3171. Find Subarray With Bitwise OR Closest to K
Find a contiguous subarray whose bitwise OR is as close as possible to k (minimize |k - OR(nums[l..r])|). The challenge is to exploit that OR accumulates bits (so extending a segment yields only O(bit-length) distinct OR values) to avoid quadratic enumeration and solve in near-linear time for n up to 1e5.
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